US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter I — PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 179 — SPECIFICATIONS FOR TANK CARSSubpart A — Introduction, Approvals and Reports179.649 C.F.R. § 179.6Repairs and alterations.Last amended: 2016Year: 2026Length: 33 wordsOfficial source Cite as 49 C.F.R. § 179.6 (2026)For procedure to be followed in making repairs or alterations, see appendix R of the AAR Specifications for Tank Cars (IBR, see § 171.7 of this subchapter). [68 FR 75759, Dec. 31, 2003]Cross-references to the CFR171.7Previous49 C.F.R. § 179.5Next49 C.F.R. § 179.7